Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
vay doanh » van doanh, ly doanh, voi doanh
toc sach » hoc sach, doc sach, thuoc sach
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
xay hoi » xa hoi, tay hoi, cay phoi
cac toc » cac thoi
dan cua » dan ca, ban cua, dai cua
cac toi » cac thoi
cua te » cua tu
y dang » ky dang, 2 dang, _ dang

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y dang xay hoi. hieu van ((((cac toc) OR (cac nuoc))) OR (cac toi)) vay doanh dan cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y dang xay hoi. hieu van ((((cac toc) OR (cac nuoc))) or (cac toi)) vay doanh dan cua te~".
• Adding a wildcard symbol may retrieve word variants: toc sach y dang xay hoi. hieu van ((((cac toc) OR (cac nuoc))) or (cac toi)) vay doanh dan cua te*.